If you have Oakley Gascan replacement lenses, this is for you. They are also available for cheap on Amazon or Aliexpress.

The frame is printed laying flat with only bed supports, with layer height not more than 0.16. I would also reduce the allowed angle for supports to have it uninterrupted.

The temples will require supports too, mirror a copy of the STL to have left and right. The pieces of filament can be used instead of screws.